polars-hash 0.1.2

Stable non-cryptographic and cryptographic hashing functions for Polars

Hellooo :)

This plugin is a work in progress. The main goal of this plugin is to provide a stable hashing functionality across different polars versions.

Main drive behind this plugin is, to generate surrogate table keys that can be determinstic across multiple polars versions.

Examples

Cryptographic Hashers

import polars
import polars_hash as plh

df = pl.DataFrame({
    "foo":["hello_world"]
})

result = df.select(plh.col('foo').chash.sha256())

print(result)

┌──────────────────────────────────────────────────────────────────┐
│ foo                                                              │
│ ---                                                              │
│ str                                                              │
╞══════════════════════════════════════════════════════════════════╡
│ 35072c1ae546350e0bfa7ab11d49dc6f129e72ccd57ec7eb671225bbd197c8f1 │
└──────────────────────────────────────────────────────────────────┘

Non-cryptographic Hashers

df = pl.DataFrame({
    "foo":["hello_world"]
})

result = df.select(plh.col('foo').nchash.wyhash())
print(result)
┌──────────────────────┐
│ foo                  │
│ ---                  │
│ str                  │
╞══════════════════════╡
│ 16737367591072095403 │
└──────────────────────┘

Create hash from multiple columns

df = pl.DataFrame({
    "foo":["hello_world"],
    "bar": ["today"]
})

result = df.select(plh.concat_str('foo','bar').chash.sha256())